Tire puncture sealant

Abstract

A tire puncture sealant having both excellent sealing performance and excellent storage performance, specifically a tire puncture sealant containing a natural rubber latex (A) and a VEVA copolymer resin emulsion (B), wherein the solid content mass of the natural rubber latex (A) / solid content mass of the VEVA copolymer resin emulsion (B) is between 80 / 20 and 15 / 85.

Description

PRIORITY CLAIM[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application Nos. 2009-147871 and 2009-214287, filed Jun. 22, 2009, the entire contents of both of which is incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a tire puncture sealant.[0004]2. Related Art[0005]Automobile manufacturers are more frequently providing puncture repair kits as standard or optional equipment. Such puncture repair kits contain a tire puncture sealant as an essential constituent and can also include a compressor as an optional constituent. Actual products are generally compact packages that combine the tire puncture sealant, known as an “emergency tire puncture repairing agent” or the like, and a low capacity compressor that draws power via a cigarette lighter socket.[0006]Conventionally, products containing a rubber latex and / or a resin emulsion, an antifreezing agent and a tackifier have been widely...

AI Technical Summary

Benefits of technology

[0017]As a result of further diligent research into how to obtain a tire puncture sealant having excellent sealing performance and storage performance without containing a tackifier as an essential component, the inventors of the present invention discovered that a tire puncture sealant containing a natural rubber latex (A) and a copolymer resin emulsion of an ester of versatic acid and vinyl alcohol (B) (hereinafter called “VEOVA”), in which a ratio (A) / (B) of a solid content mass of the natural rubber latex (A) to a solid content mass of the VEOVA copolymer resin emulsion (B) falls within a specified range, exhibits excellent sealing performance and storage performance, thereby arriving at the present invention.

[0018]Furthermore, the inventors of the present invention discovered that by using a non-ionic surfactant in combination with an anionic surfactant, it is possible to further improve sealing performance and storage performance, thereby increasing the benefits of the present invention.

[0019]The inventors of the present invention also discovered during the process of arriving at the present invention that it is possible to greatly reduce an amount of gel produced in the natural rubber latex by suppressing an increase in a temperature of a mixed system to 10° C. or less when adding an antifreezing agent (especially a glycol-based compound) to a mixed system containing the natural rubber latex in order to produce the tire puncture sealant.

[0034]According to the present invention, it is possible to provide a tire puncture sealant having both excellent sealing performance and excellent storage performance.

Problems solved by technology

Therefore, the puncture repair kits are subjected to repeated vibration when the vehicle moves and are exposed to extremely high temperatures inside the vehicle or inside the trunk on hot sunny days.

By taking into account such actual storage conditions, there is a high probability that the puncture sealant described in Japanese Patent No. 3210863 will not exhibit satisfactory sealing performance after being stored in a vehicle for a long period of time.

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